Equilibrant Force is a force which brings equilibrium state. It is considered to be the equal and opposite of the resultant force. Equilibrant force is the force, which keeps any object motion less and acts on virtually every object in the world that is not moving. This term was first used in the 1800s to indicate counterbalancing a force system.
For forces (F1, F2, ....), equilibrium (FE) will be opposite to the resultant force (FR).
So, : (Opposite Direction)
Example for Equilibrant Force
Let us consider the following example:
Two forces are pushing an object along the ground. One force is 10 N [W] and the other is 8.0 N [S]. For Calculating the equilibrant for the given situation.
By using Pythagoras' theorem,
= 10^2 + 8^2
So, c = 13 N
For Calculating the angle where the 8.0 N force and the equilibrant touch,
tanΘ = =
Hence, Θ = 51°
The equilibrant is 13 N [N51°E].
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